matrix-free

One matrix-free spectral primitive for an operator's whole spectral world — densities, moments, free convolution, pseudospectra, the Brown measure, dequantization diagnostics. Spans 18+ fields of math & physics. pip install resona

scientific-computing quantum-computing gaussian-processes lanczos spectral-methods numerical-linear-algebra random-matrix-theory matrix-free dequantization pseudospectral-methods quantum-computing-algorithms stochastic-trace-estimation free-probability pseudospectra

Updated Jun 26, 2026
Python

FabianKP / matrix_free_nnls

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Matrix-free implementation of accelerated projected gradient descent for large-scale non-negative least-squares problems.

sparse-matrix matrix-free non-negative-least-squares

Updated Nov 6, 2022
Python

StatPal / symr

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C++, R and Python package for the Synthetic MR imaging program symr. For the R and python programs, see the R and python branches respectively.

python r rcpp cpp mri em-algorithm matrix-free synthetic-mri

Updated Aug 24, 2023
C++

maksim-movsisyan / CFD-Solver

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Fully implicit density-based solver for compressible viscous flows on unstructured meshes. The project focuses on matrix-free approaches to implicit solver implementation

automatic-differentiation cfd finite-volume compressible-flows matrix-free viscous-flow computional-fluid-dynamics unstructured-mesh implicit-solver dednsity-based jacobian-free

Updated Jun 15, 2026
Fortran

lenardrommel / linox

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Light-weight linear operators in JAX with plum-dispatch and without additional dependencies

scientific-computing linear-operators matrix-free jax

Updated Aug 21, 2026
Python

gcol33 / linop

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Matrix-free linear operators for R. Define an operator by its action, compose it lazily, and carry capabilities together with the evidence behind them.

r linear-algebra numerical-methods r-package krylov linear-operators matrix-free

Updated Aug 3, 2026
R

ElsevierSoftwareX / SOFTX-D-21-00172

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A library to build up lazily evaluated expressions of linear transforms for efficient scientific computing. To cite this Original Software Publication: https://www.sciencedirect.com/science/article/pii/S2352711022000218

compressed-sensing linear-algebra matrix-free linear-transformation

Updated Feb 4, 2022
Python

marvinpfoertner / 2024-pn-spring-school

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Practical session on implementing probabilistic linear solvers at the Probabilistic Numerics Spring School 2024

conjugate-gradient linear-solvers finite-element-methods gaussian-process-regression probabilistic-numerics matrix-free galerkin-method

Updated Apr 10, 2024
Jupyter Notebook

MatrixFreeSama / ImplicitDynamicsCollections

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Experimental research repository for NRII and solver-relay architectures. Not currently ready for practical or production use; extensive engineering validation, robustness testing, and reproducibility work are ongoing.

experimental scientific-computing matrix-free hybrid-solver implicit-solver